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| author | Shao Miller <shao.miller@yrdsb.edu.on.ca> | 2010-06-28 02:40:12 -0400 |
|---|---|---|
| committer | Shao Miller <shao.miller@yrdsb.edu.on.ca> | 2010-07-10 01:03:06 -0400 |
| commit | 6880951cdaadf554a7536859f1a001bed9fd9c34 (patch) | |
| tree | ddb453adf58203d1814718ad5640d696ff0250aa /com32/include | |
| parent | 092b8884d54f6469dd401283d6fdc401a3481444 (diff) | |
| download | syslinux-6880951cdaadf554a7536859f1a001bed9fd9c34.tar.gz | |
chain.c32, libcom32: Move chs macros and chs typedef as disk_chs
Moving portions of chain.c32 into libcom32.
Signed-off-by: Shao Miller <shao.miller@yrdsb.edu.on.ca>
Diffstat (limited to 'com32/include')
| -rw-r--r-- | com32/include/syslinux/disk.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/com32/include/syslinux/disk.h b/com32/include/syslinux/disk.h index e81bd3b7..d893d7f7 100644 --- a/com32/include/syslinux/disk.h +++ b/com32/include/syslinux/disk.h @@ -57,6 +57,17 @@ struct disk_ebios_dapa { uint64_t lba; }; +/** + * CHS (cylinder, head, sector) value extraction macros. + * Taken from WinVBlock. None expand to an lvalue. +*/ +#define chs_head(chs) chs[0] +#define chs_sector(chs) (chs[1] & 0x3F) +#define chs_cyl_high(chs) (((uint16_t)(chs[1] & 0xC0)) << 2) +#define chs_cyl_low(chs) ((uint16_t)chs[2]) +#define chs_cylinder(chs) (chs_cyl_high(chs) | chs_cyl_low(chs)) +typedef uint8_t disk_chs[3]; + extern int disk_int13_retry(const com32sys_t * inreg, com32sys_t * outreg); extern int disk_get_params(int disk, struct disk_info *const diskinfo); extern void *disk_read_sectors(const struct disk_info *const diskinfo, |